Blowpipe



May 20, 1930: LLAUME. 13595769 BLOWPIPE Filed may 20, 1925 Patented May20, 1930 v v UNITED. STATES PATENT OFFICE v GYPBIEN VUILLAUME, OF-LYON,FRANCE BLOWPIPE Application filed Kay 20, 1925,

by striations carried by the acetylene burner.

' n The mixing chamber is thus in the form of a cylinder having fordiameter, the diameter .of the orifice and for height, the lengththereof. It is as reduced as possible and is practically only a fewmillimeters. It is therefore outside the burners that the intimatemixture of the gases is made.

A jet of oxygen, added to the whole of the preceding system, enables theblowpipe to ,be used for cutting purposes. Finally by capping the wholewith a cap of any'geometrical shape suited to the kind of work, andproviding an air-feed pipe working under pressure to issue in said cap,the blowpipe can be used for cutting under water,'.the water beingprevented from entering the cap by the air. The annexed drawingsillustrate an ex ample of construction of the invention in which Fig. 1is a longitudinal section through theblowpipe, v

Fig. 2 is a front view of the oxygen burner, looking at the tip, and IFig. 3 is a perspective view of same. The blowpipe comprises an outersleeve or tube a in which is fitted, at one of its ends, a sphericalbody I), which receives the supplies of gas and carries theneedle-valves 0, d and at the other end a metalblockz -b provided withdifierent ducts and on which are screwed the burners e f g. Thespherical body I) and the block b have their ducts connected by metaltubes h, z, j, k.

The acetylene necessary for the working of the blowpipe is fed through'the tube It said grooves,

Serial No. 31,639, and in France 'May 20,, 1924.

controlled by the needle-valve c said tube being connected to the burnere ending in the form of a cone, grooved in the longitudinal direction ofthe'burner. This burner leads into the mouth of the burner 7 which isscrewed on the metal block 6 at the end of the oxygen feed duct 2',which starts in the chamber l which is in direct connection with thesource of oxygen; the suppl to the duct '11 is controlled by the needleva ve d.

The point of burner e rests on the inner wall of burner f, and theoxygen required for the combustion escapes through the aforeand theacetylene is conducted to the tip by the central duct h;

Connected with the chamber Z is a second oxygen duct j, controlled bythe valve m and which issues in immediate proximity to the lighted jet,to enable cutting work to be performed. 7

In order to beable to employ the blowpipe under water, a cap n ofsuitable shape, round, oval, etc. is screwed on the end of the apparatusand inslde this cap a pipe conveying compressed air feeds, the feedbeing con trolled by the valve 0; this air expels the water from the capn and enables the blowpipe to work.

For working under water, in the first place the compressed air valve 0is opened, so as to expel the water from the cap n. Then theneedle-valve 0 is opened and the gas jet is ignited by an electricdevice. The oxygen is fed by opening more or less the needle-valve d, inorder to regulate the flame. The mixture being made, the valve m isopened to prime the cutting jet.

What I claim is my invention and desire to secure by Letters Patent ofthe United States is l A blow-pipe comprising a casing having a shortend'but at an angular declination, a

plurality of valve controlled ducts'receiv'ed in said casing andextending therethrough, a conical nozzle for each duct arrangedconcentrically with respect to each other and mounted in the short endof the casing, the innermost of said concentrically arranged nozzlesbeing provided with striations formed on its outersurface a w secured tothe free extremity of said short end about the concentrically arrangednozzle andanair duct opening rearwardly of said cap for directlydelivcringcon pressed air into the same.

In witness whereof I have signed this specification.

CYPRIEN VUILLAUME;

